---
title: "Deprecation: #85122 - Functionality in CharsetConverter"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:deprecation-85122"
source: "Changelog/9.3/Deprecation-85122-FunctionalityInCharsetConverter.rst"
typo3-version: "9.3"
typo3-major: 9
type: "deprecation"
issue: 85122
forge: "https://forge.typo3.org/issues/85122"
tags: ["PHP-API", "FullyScanned"]
rendered: "2026-09-18T17:00:34+00:00"
---

# Deprecation: #85122 - Functionality in CharsetConverter {#deprecation-85122}

See [forge#85122](https://forge.typo3.org/issues/85122)

## Description {#description}

The following methods have been marked as deprecated due to better functionality mostly provided by native
PHP functionality, like `mbstring` functions.

-   `CharsetConverter->synonyms`
-   `CharsetConverter->parse_charset()`
-   Fourth parameter of `CharsetConverter->conv()`
-   `CharsetConverter->convArray()`
-   `CharsetConverter->utf8_to_entities()`
-   `CharsetConverter->entities_to_utf8()`
-   `CharsetConverter->crop()`
-   `CharsetConverter->convCaseFirst()`
-   `CharsetConverter->utf8_char2byte_pos()`

Additionally the following public properties have been changed to have a "protected" visibility,
as these only reflect internal state:

-   `CharsetConverter->noCharByteVal`
-   `CharsetConverter->parsedCharsets`
-   `CharsetConverter->toASCII`
-   `CharsetConverter->twoByteSets`
-   `CharsetConverter->eucBasedSets`

## Impact {#impact}

Calling any of the methods or accessing any of the properties will trigger a PHP `E_USER_DEPRECATED` error.

## Affected Installations {#affected-installations}

TYPO3 installations with extensions making use of the CharsetConverter methods or properties directly.

## Migration {#migration}

Use native PHP equivalents instead, see the methods directly for substitutes.